摘要
介绍了国内外超低硫柴油生产技术的研究进展。针对空间位阻会影响硫化物脱除的反应机理及加氢催化剂活性相理论研究,认为二苯并噻吩上4,6位取代基具有明显的空间位阻效应,能显著地降低硫化物的反应速率;加氢催化剂活性相普遍接受的模型为Co-Mo-S模型及Rim-Edge模型。在此基础上,通过载体制备技术及活性金属浸渍技术的不断进步,开发了TK系列、KF系列、DN系列、DC系列、FHUDS系列以及RS系列等超深度加氢脱硫催化剂。工艺方面,除了原料、操作条件优化及装置改造等传统手段外,还包括两段加氢工艺技术、气液逆流加氢反应工艺技术、液相循环加氢技术、催化剂级配组合技术等新工艺技术。
The research progress of hydrotreating catalysts and process technologies for ultra-low sulfur diesel production both at home and abroad are introduced. Based on theoretical research of steric hinde sulfidereaction mechanisms and active phase of hydrotreating catalysts, it is believed that the 4, 6 substituents on bisbensothiphene have obvious sterichindrance, which has greatly reduced the reaction rate of sulfides. The models generally accepted for the active phase of hydrotreating catalysts are Co-Mo-S model and Rim-Edge model. With the technical progress of preparation of carriers and metal impregnation, the ultra-deep hydrodes- ulfurization catalysts of TK series, KF series, DN series, DC series, FHUDS series and RS series, etc have been successfully developed. In addition, the ultra-low sulfur diesel can also be produced by optimization of feedstocks and operation conditions, unit revamping and application of two-stage hydrotreating process, gas- liquid countercurrent hydrogenation process, liquid-phase hydrogenation process and catalyst grading technolo- gy etc. These new technologies have provided a strong support for ultra low sulfur diesel production.
出处
《炼油技术与工程》
CAS
2015年第9期1-5,共5页
Petroleum Refinery Engineering
关键词
柴油
超深度脱硫
加氢催化剂
diesel, ultra-deep hydrodesulfurization, hydrogenation catalyst
